867920631 has 4 divisors (see below), whose sum is σ = 1157227512. Its totient is φ = 578613752.

The previous prime is 867920591. The next prime is 867920639. The reversal of 867920631 is 136029768.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 867920631 - 2¹⁸ = 867658487 is a prime.

It is a super-2 number, since 2×867920631² = 1506572443430876322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (867920639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144653436 + ... + 144653441.

It is an arithmetic number, because the mean of its divisors is an integer number (289306878).

Almost surely, 2^867920631 is an apocalyptic number.

867920631 is a deficient number, since it is larger than the sum of its proper divisors (289306881).

867920631 is a wasteful number, since it uses less digits than its factorization.

867920631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289306880.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 867920631 is about 29460.4927148206. The cubic root of 867920631 is about 953.8791088808.

The spelling of 867920631 in words is "eight hundred sixty-seven million, nine hundred twenty thousand, six hundred thirty-one".